4000443 has 8 divisors (see below), whose sum is σ = 5369856. Its totient is φ = 2649000.

The previous prime is 4000439. The next prime is 4000489. The reversal of 4000443 is 3440004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4000443 - 2² = 4000439 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4000043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3963 + ... + 4868.

It is an arithmetic number, because the mean of its divisors is an integer number (671232).

Almost surely, 2^4000443 is an apocalyptic number.

4000443 is a deficient number, since it is larger than the sum of its proper divisors (1369413).

4000443 is a wasteful number, since it uses less digits than its factorization.

4000443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8985.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 4000443 is about 2000.1107469338. The cubic root of 4000443 is about 158.7459651360.

Adding to 4000443 its reverse (3440004), we get a palindrome (7440447).

The spelling of 4000443 in words is "four million, four hundred forty-three", and thus it is an aban number.